71273473 has 4 divisors (see below), whose sum is σ = 71361108. Its totient is φ = 71185840.

The previous prime is 71273471. The next prime is 71273483. The reversal of 71273473 is 37437217.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35129329 + 36144144 = 5927^2 + 6012^2 .

It is a cyclic number.

It is not a de Polignac number, because 71273473 - 2¹ = 71273471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71273471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42586 + ... + 44227.

It is an arithmetic number, because the mean of its divisors is an integer number (17840277).

Almost surely, 2^71273473 is an apocalyptic number.

It is an amenable number.

71273473 is a deficient number, since it is larger than the sum of its proper divisors (87635).

71273473 is an equidigital number, since it uses as much as digits as its factorization.

71273473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87634.

The product of its digits is 24696, while the sum is 34.

The square root of 71273473 is about 8442.3618140897. The cubic root of 71273473 is about 414.6127378778.

The spelling of 71273473 in words is "seventy-one million, two hundred seventy-three thousand, four hundred seventy-three".